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clang-p2996/llvm/test/Transforms/SLPVectorizer/X86/reduction2.ll
Alexey Bataev a0086add2e [SLP]Improve gathering of scalar elements. 
1. Better sorting of scalars to be gathered. Trying to insert
   constants/arguments/instructions-out-of-loop at first and only then
   the instructions which are inside the loop. It improves hoisting of
   invariant insertelements instructions.
2. Better detection of shuffle candidates in gathering function.
3. The cost of insertelement for constants is 0.

Part of D57059.

Differential Revision: https://reviews.llvm.org/D103458
2021-06-09 05:23:21 -07:00

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7.5 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -basic-aa -slp-vectorizer -dce -S -mtriple=i386-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32-S128"
target triple = "i386-apple-macosx10.8.0"
define double @foo(double* nocapture %D) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: br label [[TMP1:%.*]]
; CHECK: 1:
; CHECK-NEXT: [[I_02:%.*]] = phi i32 [ 0, [[TMP0:%.*]] ], [ [[TMP12:%.*]], [[TMP1]] ]
; CHECK-NEXT: [[SUM_01:%.*]] = phi double [ 0.000000e+00, [[TMP0]] ], [ [[TMP11:%.*]], [[TMP1]] ]
; CHECK-NEXT: [[TMP2:%.*]] = shl nsw i32 [[I_02]], 1
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds double, double* [[D:%.*]], i32 [[TMP2]]
; CHECK-NEXT: [[TMP4:%.*]] = bitcast double* [[TMP3]] to <2 x double>*
; CHECK-NEXT: [[TMP5:%.*]] = load <2 x double>, <2 x double>* [[TMP4]], align 4
; CHECK-NEXT: [[TMP6:%.*]] = fmul <2 x double> [[TMP5]], [[TMP5]]
; CHECK-NEXT: [[TMP7:%.*]] = fmul <2 x double> [[TMP6]], [[TMP6]]
; CHECK-NEXT: [[TMP8:%.*]] = extractelement <2 x double> [[TMP7]], i32 0
; CHECK-NEXT: [[TMP9:%.*]] = extractelement <2 x double> [[TMP7]], i32 1
; CHECK-NEXT: [[TMP10:%.*]] = fadd double [[TMP8]], [[TMP9]]
; CHECK-NEXT: [[TMP11]] = fadd double [[SUM_01]], [[TMP10]]
; CHECK-NEXT: [[TMP12]] = add nsw i32 [[I_02]], 1
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[TMP12]], 100
; CHECK-NEXT: br i1 [[EXITCOND]], label [[TMP13:%.*]], label [[TMP1]]
; CHECK: 13:
; CHECK-NEXT: ret double [[TMP11]]
;
br label %1
; <label>:1 ; preds = %1, %0
%i.02 = phi i32 [ 0, %0 ], [ %10, %1 ]
%sum.01 = phi double [ 0.000000e+00, %0 ], [ %9, %1 ]
%2 = shl nsw i32 %i.02, 1
%3 = getelementptr inbounds double, double* %D, i32 %2
%4 = load double, double* %3, align 4
%A4 = fmul double %4, %4
%A42 = fmul double %A4, %A4
%5 = or i32 %2, 1
%6 = getelementptr inbounds double, double* %D, i32 %5
%7 = load double, double* %6, align 4
%A7 = fmul double %7, %7
%A72 = fmul double %A7, %A7
%8 = fadd double %A42, %A72
%9 = fadd double %sum.01, %8
%10 = add nsw i32 %i.02, 1
%exitcond = icmp eq i32 %10, 100
br i1 %exitcond, label %11, label %1
; <label>:11 ; preds = %1
ret double %9
}
define i1 @two_wide_fcmp_reduction(<2 x double> %a0) {
; CHECK-LABEL: @two_wide_fcmp_reduction(
; CHECK-NEXT: [[A:%.*]] = fcmp ogt <2 x double> [[A0:%.*]], <double 1.000000e+00, double 1.000000e+00>
; CHECK-NEXT: [[B:%.*]] = extractelement <2 x i1> [[A]], i32 0
; CHECK-NEXT: [[C:%.*]] = extractelement <2 x i1> [[A]], i32 1
; CHECK-NEXT: [[D:%.*]] = and i1 [[B]], [[C]]
; CHECK-NEXT: ret i1 [[D]]
;
%a = fcmp ogt <2 x double> %a0, <double 1.0, double 1.0>
%b = extractelement <2 x i1> %a, i32 0
%c = extractelement <2 x i1> %a, i32 1
%d = and i1 %b, %c
ret i1 %d
}
define double @fadd_reduction(<2 x double> %a0) {
; CHECK-LABEL: @fadd_reduction(
; CHECK-NEXT: [[A:%.*]] = fadd fast <2 x double> [[A0:%.*]], <double 1.000000e+00, double 1.000000e+00>
; CHECK-NEXT: [[B:%.*]] = extractelement <2 x double> [[A]], i32 0
; CHECK-NEXT: [[C:%.*]] = extractelement <2 x double> [[A]], i32 1
; CHECK-NEXT: [[D:%.*]] = fadd fast double [[B]], [[C]]
; CHECK-NEXT: ret double [[D]]
;
%a = fadd fast <2 x double> %a0, <double 1.000000e+00, double 1.000000e+00>
%b = extractelement <2 x double> %a, i32 0
%c = extractelement <2 x double> %a, i32 1
%d = fadd fast double %b, %c
ret double %d
}
; PR43745 https://bugs.llvm.org/show_bug.cgi?id=43745
define i1 @fcmp_lt_gt(double %a, double %b, double %c) {
; CHECK-LABEL: @fcmp_lt_gt(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[FNEG:%.*]] = fneg double [[B:%.*]]
; CHECK-NEXT: [[MUL:%.*]] = fmul double [[A:%.*]], 2.000000e+00
; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x double> poison, double [[C:%.*]], i32 1
; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x double> [[TMP0]], double [[FNEG]], i32 0
; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> poison, double [[C]], i32 0
; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> [[TMP2]], double [[B]], i32 1
; CHECK-NEXT: [[TMP4:%.*]] = fsub <2 x double> [[TMP1]], [[TMP3]]
; CHECK-NEXT: [[TMP5:%.*]] = insertelement <2 x double> poison, double [[MUL]], i32 0
; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x double> [[TMP5]], double [[MUL]], i32 1
; CHECK-NEXT: [[TMP7:%.*]] = fdiv <2 x double> [[TMP4]], [[TMP6]]
; CHECK-NEXT: [[TMP8:%.*]] = extractelement <2 x double> [[TMP7]], i32 1
; CHECK-NEXT: [[CMP:%.*]] = fcmp olt double [[TMP8]], 0x3EB0C6F7A0B5ED8D
; CHECK-NEXT: [[TMP9:%.*]] = extractelement <2 x double> [[TMP7]], i32 0
; CHECK-NEXT: [[CMP4:%.*]] = fcmp olt double [[TMP9]], 0x3EB0C6F7A0B5ED8D
; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[CMP]], [[CMP4]]
; CHECK-NEXT: br i1 [[OR_COND]], label [[CLEANUP:%.*]], label [[LOR_LHS_FALSE:%.*]]
; CHECK: lor.lhs.false:
; CHECK-NEXT: [[TMP10:%.*]] = fcmp ule <2 x double> [[TMP7]], <double 1.000000e+00, double 1.000000e+00>
; CHECK-NEXT: [[TMP11:%.*]] = extractelement <2 x i1> [[TMP10]], i32 0
; CHECK-NEXT: [[TMP12:%.*]] = extractelement <2 x i1> [[TMP10]], i32 1
; CHECK-NEXT: [[NOT_OR_COND9:%.*]] = or i1 [[TMP11]], [[TMP12]]
; CHECK-NEXT: ret i1 [[NOT_OR_COND9]]
; CHECK: cleanup:
; CHECK-NEXT: ret i1 false
;
entry:
%fneg = fneg double %b
%add = fsub double %c, %b
%mul = fmul double %a, 2.000000e+00
%div = fdiv double %add, %mul
%sub = fsub double %fneg, %c
%div3 = fdiv double %sub, %mul
%cmp = fcmp olt double %div, 0x3EB0C6F7A0B5ED8D
%cmp4 = fcmp olt double %div3, 0x3EB0C6F7A0B5ED8D
%or.cond = and i1 %cmp, %cmp4
br i1 %or.cond, label %cleanup, label %lor.lhs.false
lor.lhs.false:
%cmp5 = fcmp ule double %div, 1.000000e+00
%cmp7 = fcmp ule double %div3, 1.000000e+00
%not.or.cond9 = or i1 %cmp7, %cmp5
ret i1 %not.or.cond9
cleanup:
ret i1 false
}
define i1 @fcmp_lt(double %a, double %b, double %c) {
; CHECK-LABEL: @fcmp_lt(
; CHECK-NEXT: [[FNEG:%.*]] = fneg double [[B:%.*]]
; CHECK-NEXT: [[MUL:%.*]] = fmul double [[A:%.*]], 2.000000e+00
; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x double> poison, double [[C:%.*]], i32 1
; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> [[TMP1]], double [[FNEG]], i32 0
; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x double> poison, double [[C]], i32 0
; CHECK-NEXT: [[TMP4:%.*]] = insertelement <2 x double> [[TMP3]], double [[B]], i32 1
; CHECK-NEXT: [[TMP5:%.*]] = fsub <2 x double> [[TMP2]], [[TMP4]]
; CHECK-NEXT: [[TMP6:%.*]] = insertelement <2 x double> poison, double [[MUL]], i32 0
; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x double> [[TMP6]], double [[MUL]], i32 1
; CHECK-NEXT: [[TMP8:%.*]] = fdiv <2 x double> [[TMP5]], [[TMP7]]
; CHECK-NEXT: [[TMP9:%.*]] = fcmp uge <2 x double> [[TMP8]], <double 0x3EB0C6F7A0B5ED8D, double 0x3EB0C6F7A0B5ED8D>
; CHECK-NEXT: [[TMP10:%.*]] = extractelement <2 x i1> [[TMP9]], i32 0
; CHECK-NEXT: [[TMP11:%.*]] = extractelement <2 x i1> [[TMP9]], i32 1
; CHECK-NEXT: [[NOT_OR_COND:%.*]] = or i1 [[TMP10]], [[TMP11]]
; CHECK-NEXT: ret i1 [[NOT_OR_COND]]
;
%fneg = fneg double %b
%add = fsub double %c, %b
%mul = fmul double %a, 2.000000e+00
%div = fdiv double %add, %mul
%sub = fsub double %fneg, %c
%div3 = fdiv double %sub, %mul
%cmp = fcmp uge double %div, 0x3EB0C6F7A0B5ED8D
%cmp4 = fcmp uge double %div3, 0x3EB0C6F7A0B5ED8D
%not.or.cond = or i1 %cmp4, %cmp
ret i1 %not.or.cond
}
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